Identification and quantification of kaolinite in mixtures with goethite using short-wave infrared (SWIR) reflectance spectroscopy

We investigate here the potential of the spectroscopy in the identification and quantification of mixtures of kaolinite and goethite from the Continuum Removal (CR) of the spectra in the short-wave infrared. For this purpose, spectral measurements of the kaolinite, goethite, and controlled mixtures...

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Bibliographic Details
Main Authors: de Souza, Marcelo K., Veronez, Mauricio R., Tognoli, Francisco M. W., Gonzaga, Luiz, de Souza, Lais V., Kochhann, Marcus V. L., da Silva, Nadine G., Marson, Fernando P., Cagliari, Joice
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Absorptions features
Continuum Removal
Geologic measurements
Kaolinite
Libraries
Minerals
Reflectivity
Remote sensing
Spectroscopy
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Summary:We investigate here the potential of the spectroscopy in the identification and quantification of mixtures of kaolinite and goethite from the Continuum Removal (CR) of the spectra in the short-wave infrared. For this purpose, spectral measurements of the kaolinite, goethite, and controlled mixtures of these minerals were systematically performed. The continuum of the results were removed, the depth of the kaolinite diagnostic absorption was calculated and compared with a spectral library. It was possible to identify the kaolinite with high determination coefficient (R2>0.95) when its proportion reaches at least 60% in the mixture. For quantification purposes, it was possible to quantify kaolinite using the diagnostic absorption feature depth in the CR with a coefficient of determination of 0.99.
ISSN:2153-7003
DOI:10.1109/IGARSS.2017.8128097